电站失活SCR催化剂再生试验研究  

A research on the regeneration of deactivated SCR catalyst used in coal-fired plant

作　　者：崔力文[1] 宋浩 吴卫红 杜学森[1] 纪培栋[1] 高翔[1] 骆仲泱 岑可法[1] 

机构地区：[1]浙江大学能源清洁利用国家重点实验室,浙江杭州310027 [2]蓝天环保设备工程股份有限公司,浙江杭州310012

出　　处：《能源工程》2012年第3期43-46,54,共5页Energy Engineering

基　　金：国家自然科学基金资助项目(5107614);国家863计划资助项目(2010AA065002)

摘　　要：以在电站烟气实际运行中失活的催化剂为原料,通过去离子水水洗、硫酸酸洗、钒钨等活性物质重新负载等方法,开发了一套廉价有效的再生工艺,并通过ICP-OES、SEM、XRD等表征研究了每一步处理方法对催化剂结构和性能的影响。研究表明,经过完整再生工艺处理后失活催化剂脱硝活性在300～400℃温度窗口内提升30%以上,水洗过程能够去除大部分硫、钙等中毒元素,而酸洗经过硫酸化过程后增加催化活性中心的数量和酸性,从而提高催化剂脱硝活性,XRD表明再生后V2O5或WO3仍然以无定形态或高分散的形态分布在载体表面上。Using the deactivated SCR catalyst used in coal-fired plant as material,a cheap and effective regeneration process was developed by washing with de-ionized water,soaking in dilute sulfuric acid,reloading active substance.Through the characterization such as ICP-OES,SEM and XRD,the influences of every processing method on structure and catalytic performance were investigated.The results showed that the catalyst regenerated had a 30% increase of SCR efficiency compared to the deactivated sample from 300 to 400 centigrade.Most sulfur and calcium were removed by washing with water,and the active sites on the surface of catalyst were increased and strengthened due to dilute sulfuric acid,while XRD patterns proved that V2O5/WO3 kept amorphous or disperse on the supporter after regeneration.

关 键 词：SCR 催化剂 再生 

分 类 号：X511[环境科学与工程—环境工程]